Updated Training->free classes section

[krishnadevz]

Updated Training->free classes section with exiting Github learning labs that cover the entire GitHub ecosystem and fixed some typo's

Why: The reason for this pull request I updated the training and free classes section because I added one Github lab courses that cover the entire GitHub ecosystem

What's being changed:content/github/getting-started-with-github/git-and-github-learning-resources.md

Check off the following:

• All of the tests are passing.
• I have reviewed my changes in staging.
• For content changes, I have reviewed the localization checklist
• For content changes, I have reviewed the Content style guide for GitHub Docs.

[welcome]

Thanks for opening this pull request! A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[krishnadevz]

can you guys review my pull request?

[janiceilene]

@krishnadevz Thanks for opening a PR 👍 Please fill out the pull request template in the top comment in this pull request, then we'll get this up for review!

In the future, please do not @ mention any other person in an issue or PR, unless they are already participating in that conversation.

[krishnadevz]

@krishnadevz Thanks for opening a PR 👍 Please fill out the pull request template in the top comment in this pull request, then we'll get this up for review!

In the future, please do not @ mention any other person in an issue or PR, unless they are already participating in that conversation.

okay got it I will not @ in the future but I have done changes

[janiceilene]

👋 @krishnadevz We so appreciate your PR ✨ Learning lab is such a cool resource, but I think we're going to keep this list small instead of trying to make it exhaustive. Thank you!!